problem with lights

1959 - 1978, M151, M151A1, M151A2, Technical questions and discussions, regarding anything related to the M151.
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67N20
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problem with lights

Post by 67N20 » Mon Feb 22, 2021 6:04 pm

Good evening everyone
I'm trying to get an old 151 operational for a friend, this is a cut mutt :( Problem is no turn signals, no brake lights, no tail lights, I do have headlights high and low beam and dash lights. This has an old style relay box under dash, close to where the turn signal flasher goes metal box with ten wires attached to it on the exterior using two sets of screw on wire connections. bus is about the size of a old cigar box. inside is three relays, and black rectangle about 4 inches long appears to be a snap in. Flasher unit ?? anyway I think I should modernize what else can I use. or does someone have one of these boxes? I don't want to put a lot of money into this. Looks like this mutt was put together on a budget but quality of workmanship not bad.

67N20


hambone
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Re: problem with lights

Post by hambone » Mon Feb 22, 2021 7:42 pm

This may help, could also be problem with light switch, make sure grounds are good.
http://g838.org/viewtopic.php?f=3&t=656 ... ion#p53850

markrdje
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Re: problem with lights

Post by markrdje » Mon Feb 22, 2021 8:33 pm

I remember on the light switch the contacts corrode so to correct that you run the light switch position lever back and forth thru the lever positions to clean them.
Maybe this would work for the tail lights?
change user name to mark

67N20
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Re: problem with lights

Post by 67N20 » Tue Feb 23, 2021 6:26 am

I checked the light switch, its good, it works on my other mutt.

Rickf
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Re: problem with lights

Post by Rickf » Tue Feb 23, 2021 7:42 am

You say it was cut, have you checked the rear harness for continuity? They did not take the wires out when they cut them. :roll: :lol:
1964 M151A1
1984 M1008
1967 M416
04/1952 M100
12/1952 M100- Departed
AN/TSQ-114A Trailblazer- Gone

67N20
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Re: problem with lights

Post by 67N20 » Tue Feb 23, 2021 11:10 am

I just checked lights that where inoperative by jumping each wire individually with the batteries, they all work. :) I ordered a 24 volt flasher from NAPA, I plan on replacing that black rectangle flasher. see what happens. I know it won't fit in the mounted box. By the way all wires going in or out of box have a letter instead of a number which makes things even harder. :(

67N20
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Re: problem with lights

Post by 67N20 » Tue Feb 23, 2021 11:12 am

Hambone ...thanks for the link

Rickf
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Re: problem with lights

Post by Rickf » Wed Feb 24, 2021 8:54 am

I wish you said you were going to replace it with civvy parts, I have a TON of 24 volt civilian flashers!!
1964 M151A1
1984 M1008
1967 M416
04/1952 M100
12/1952 M100- Departed
AN/TSQ-114A Trailblazer- Gone

67N20
G-Master Sergeant
G-Master Sergeant
Posts: 113
Joined: Sat Jun 29, 2019 5:34 pm
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Re: problem with lights

Post by 67N20 » Wed Feb 24, 2021 1:43 pm

Thanks Rick, the old original black rectangle flasher still works:) I just found that out, as i try to figure out where these wires go :(

Rickf
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Re: problem with lights

Post by Rickf » Wed Feb 24, 2021 3:54 pm

You can get a more modern military electronic unit but you will need a different harness to go to the switch on the column.
1964 M151A1
1984 M1008
1967 M416
04/1952 M100
12/1952 M100- Departed
AN/TSQ-114A Trailblazer- Gone

67N20
G-Master Sergeant
G-Master Sergeant
Posts: 113
Joined: Sat Jun 29, 2019 5:34 pm
Location:

Re: problem with lights

Post by 67N20 » Wed Feb 24, 2021 5:15 pm

Well I opened that box up again, and found one of the points on a relay solenoid type of thing one of the points was burned through. so much for an easy job :(

67N20
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Re: problem with lights

Post by 67N20 » Sun Feb 28, 2021 7:37 pm

Well I decided to go with the new electronic unit and turn signal controller. turns out my brake light switch doesn't work so I have another one of those on the way also. I did get it running the other day, it runs strong and starts easy.


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